修改led为gpio

hc

2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d

 kernel/arch/arm64/include/asm/asm-uaccess.h
..
..
@@ -2,7 +2,7 @@
2
2
 #ifndef __ASM_ASM_UACCESS_H
3
3
 #define __ASM_ASM_UACCESS_H
4
4
 
5
-#include <asm/alternative.h>
5
+#include <asm/alternative-macros.h>
6
6
 #include <asm/kernel-pgtable.h>
7
7
 #include <asm/mmu.h>
8
8
 #include <asm/sysreg.h>
..
..
@@ -15,16 +15,16 @@
15
15
 	.macro	__uaccess_ttbr0_disable, tmp1
16
16
 	mrs	\tmp1, ttbr1_el1			// swapper_pg_dir
17
17
 	bic	\tmp1, \tmp1, #TTBR_ASID_MASK
18
-	sub	\tmp1, \tmp1, #RESERVED_TTBR0_SIZE	// reserved_ttbr0 just before swapper_pg_dir
18
+	sub	\tmp1, \tmp1, #PAGE_SIZE		// reserved_pg_dir just before swapper_pg_dir
19
19
 	msr	ttbr0_el1, \tmp1			// set reserved TTBR0_EL1
20
20
 	isb
21
-	add	\tmp1, \tmp1, #RESERVED_TTBR0_SIZE
21
+	add	\tmp1, \tmp1, #PAGE_SIZE
22
22
 	msr	ttbr1_el1, \tmp1		// set reserved ASID
23
23
 	isb
24
24
 	.endm
25
25
 
26
26
 	.macro	__uaccess_ttbr0_enable, tmp1, tmp2
27
-	get_thread_info \tmp1
27
+	get_current_task \tmp1
28
28
 	ldr	\tmp1, [\tmp1, #TSK_TI_TTBR0]	// load saved TTBR0_EL1
29
29
 	mrs	\tmp2, ttbr1_el1
30
30
 	extr    \tmp2, \tmp2, \tmp1, #48
..
..
@@ -59,28 +59,32 @@
59
59
 #endif
60
60
 
61
61
 /*
62
- * These macros are no-ops when UAO is present.
62
+ * Generate the assembly for LDTR/STTR with exception table entries.
63
+ * This is complicated as there is no post-increment or pair versions of the
64
+ * unprivileged instructions, and USER() only works for single instructions.
63
65
  */
64
-	.macro	uaccess_disable_not_uao, tmp1, tmp2
65
-	uaccess_ttbr0_disable \tmp1, \tmp2
66
-alternative_if ARM64_ALT_PAN_NOT_UAO
67
-	SET_PSTATE_PAN(1)
68
-alternative_else_nop_endif
66
+	.macro uao_ldp l, reg1, reg2, addr, post_inc
67
+8888:		ldtr	\reg1, [\addr];
68
+8889:		ldtr	\reg2, [\addr, #8];
69
+		add	\addr, \addr, \post_inc;
70
+
71
+		_asm_extable	8888b,\l;
72
+		_asm_extable	8889b,\l;
69
73
 	.endm
70
74
 
71
-	.macro	uaccess_enable_not_uao, tmp1, tmp2, tmp3
72
-	uaccess_ttbr0_enable \tmp1, \tmp2, \tmp3
73
-alternative_if ARM64_ALT_PAN_NOT_UAO
74
-	SET_PSTATE_PAN(0)
75
-alternative_else_nop_endif
75
+	.macro uao_stp l, reg1, reg2, addr, post_inc
76
+8888:		sttr	\reg1, [\addr];
77
+8889:		sttr	\reg2, [\addr, #8];
78
+		add	\addr, \addr, \post_inc;
79
+
80
+		_asm_extable	8888b,\l;
81
+		_asm_extable	8889b,\l;
76
82
 	.endm
77
83
 
78
-/*
79
- * Remove the address tag from a virtual address, if present.
80
- */
81
-	.macro	untagged_addr, dst, addr
82
-	sbfx	\dst, \addr, #0, #56
83
-	and	\dst, \dst, \addr
84
-	.endm
84
+	.macro uao_user_alternative l, inst, alt_inst, reg, addr, post_inc
85
+8888:		\alt_inst	\reg, [\addr];
86
+		add		\addr, \addr, \post_inc;
85
87
 
88
+		_asm_extable	8888b,\l;
89
+	.endm
86
90
 #endif